teamviewer_setup.exe

TeamViewer

Sevas-S LLC

The application teamviewer_setup.exe by Sevas-S has been detected as adware by 13 anti-malware scanners. The program is a setup application that uses the NSIS (Nullsoft Scriptable Install System) installer. According to AVG, this software downloads additional adware offers during setup. The file has been seen being downloaded from www.joydownload.com and multiple other hosts.
Publisher:
Sevas-S LLC  (signed and verified)

Product:
TeamViewer

Version:
1.0.0.0

MD5:
9a3e4133bed1fb436b7908b349b8b95e

SHA-1:
8dc8fff33e9261287a830031c9c207dc9e3c119c

SHA-256:
16513db98839abbface4a669bc189ba59f1cc5ef908028d959d0232d1287bdd1

Scanner detections:
13 / 68

Status:
Adware

Explanation:
Packages the OpenCandy software bundler that offers to install additional software and may include web browser add-ons and toolbars which display advertising (based on publisher settings and geo context).

Analysis date:
6/21/2018 1:44:02 AM UTC  (today)

Scan engine
Detection
Engine version

Agnitum Outpost
Riskware.OpenCandy
7.1.1

AVG
Downloader
2015.0.3505

Dr.Web
Adware.Downware.1446
9.0.1.0103

ESET NOD32
Win32/JoyDownloader
8.9665

K7 AntiVirus
Unwanted-Program
13.176.11721

Kaspersky
not-a-virus:AdWare.Win32.OpenCandy
14.0.0.4021

Malwarebytes
PUP.Optional.OpenCandy
v2014.04.13.05

McAfee
Artemis!9A3E4133BED1
5600.7161

McAfee Web Gateway
Artemis!9A3E4133BED1
7.7161

Reason Heuristics
PUP.Installer.SevasS.Q
14.8.7.20

Rising Antivirus
PE:PUF.OpenCandy!1.9DE5
23.00.65.14411

Sophos
Generic PUA IN
4.98

VIPRE Antivirus
Sevas-S Installer
28194

File size:
475.4 KB (486,808 bytes)

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

Language:
English (United States)

Common path:
C:\users\{user}\downloads\teamviewer_setup.exe

Digital Signature
Signed by:

Authority:
VeriSign, Inc.

Valid from:
1/23/2013 5:30:00 AM

Valid to:
2/23/2014 5:29:59 AM

Subject:
CN=Sevas-S LLC, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Sevas-S LLC, L=Kyiv, S=Kyivska oblast, C=UA

Issuer:
CN=VeriSign Class 3 Code Signing 2010 CA, OU=Terms of use at https://www.verisign.com/rpa (c)10, OU=VeriSign Trust Network, O="VeriSign, Inc.", C=US

Serial number:
527471E53862E2F90AB45ED4ACB8F4C2

File PE Metadata
Compilation timestamp:
5/20/2013 5:22:54 AM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
12288:MaCbwtvFhjs17FEUDTTup+Ts9PJYz5jtNcB+/TRfYH:KbqFhm7FjDHuzJYz5jtXTBYH

Entry address:
0x31B1

Entry point:
81, EC, D4, 02, 00, 00, 53, 55, 56, 57, 6A, 20, 33, ED, 5E, 89, 6C, 24, 18, C7, 44, 24, 10, D8, 92, 40, 00, 89, 6C, 24, 14, FF, 15, 34, 70, 40, 00, 68, 01, 80, 00, 00, FF, 15, 34, 71, 40, 00, 55, FF, 15, AC, 72, 40, 00, 6A, 08, A3, 58, 92, 42, 00, E8, 90, 2E, 00, 00, A3, A4, 91, 42, 00, 55, 8D, 44, 24, 34, 68, B4, 02, 00, 00, 50, 55, 68, 58, 06, 42, 00, FF, 15, 7C, 71, 40, 00, 68, C0, 92, 40, 00, 68, A0, 81, 42, 00, E8, FB, 2A, 00, 00, FF, 15, 38, 71, 40, 00, BB, 00, 40, 43, 00, 50, 53, E8, E9, 2A, 00, 00...
 
[+]

Entropy:
7.8583

Packer / compiler:
Nullsoft install system v2.x

Code size:
23.5 KB (24,064 bytes)

The file teamviewer_setup.exe has been seen being distributed by the following 9 URLs.

http://www.joydownload.com/wi/hPXA8FtN4SYFn7cJEM7tUA/1397152024/1/3/1/.../TeamViewer_Setup.exe

http://www.joydownload.com/wi/8d7738731030638beaf65b38465d3a20/1/3/1/.../TeamViewer_Setup.exe

http://pt.joydownload.com/wi/w3hVjHnassjrSsIakVT-kg/1395223365/1/3/1/.../TeamViewer_Setup.exe

The executing file has been seen to make the following network communication in live environments.

TCP (HTTP):
Connects to ec2-23-21-66-175.compute-1.amazonaws.com  (23.21.66.175:80)

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